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2. How to spot a credit card skimmer - AOL

   www.aol.com/finance/spot-credit-card-skimmer...

   Plus, you have the opportunity to contest fraudulent charges on your card and also benefit from your credit card’s zero liability policy. Check your statements. When you do make purchases with ...

3. Luhn algorithm - Wikipedia

   en.wikipedia.org/wiki/Luhn_algorithm

   The check digit is calculated by (()), where s is the sum from step 3. This is the smallest number (possibly zero) that must be added to s {\displaystyle s} to make a multiple of 10. Other valid formulas giving the same value are 9 − ( ( s + 9 ) mod 1 0 ) {\displaystyle 9-((s+9){\bmod {1}}0)} , ( 10 − s ) mod 1 0 {\displaystyle (10-s){\bmod ...

4. What is a credit reporting agency? - AOL

   www.aol.com/finance/credit-reporting-agency...

   Credit reporting agencies may release information about you to creditors, landlords, insurance companies, utility companies and others with a valid need to check your credit history.

5. Identify legitimate AOL websites, requests, and communications

   help.aol.com/articles/identify-legitimate-aol...

   Hover over hyperlinks with your cursor to preview the destination URL. Sometimes a hyperlink can be displayed as an AOL link in an email when in fact the destination URL is to a malicious domain. • Be careful when authorizing an app to access your account or when providing any third-party access to your account info.

6. What Is a Billing Zip Code? How To Find Yours for Your Credit ...

   www.aol.com/billing-zip-code-yours-credit...

   You can check your most recent credit card bill as it will have your address on it which contains your zip code. Go to USPS.com and click on “Find a Zip Code.” Look up your account information ...

7. Postal address verification - Wikipedia

   en.wikipedia.org/wiki/Postal_address_verification

   According to the United States Postal Service, an address is valid (or mailable) if it is CASS-certified, meaning that it exists within the comprehensive list of mailable addresses in their Address Management System. This is different from the credit card Address Verification System (AVS), which is the method used by credit card processors to ...